Question 2 (28 points) 7. Determine the intersection, if any, of the planes with equations x +y - z + 12 =0 and 2x + 4y - 3z + 8 = 0. 8. Solve the following system of equations and give a geometrical interpretation of the result. xty+z=6 2x+ y - 32 =-5 4x - 5y +2= -3 9. Give a geometrical interpretation of the intersection of the planes with equations x+ y - 3=0 y+z+5=0 x+z+2=0